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Y y (No Model.)

J. P. CREIGHTON. m1813108 GBA-31,188.10; BULLBY.

. No. 288,888. i "Pam-88d 088. 8, 1888.

j UNITED ,STATES ATENT Fries.

JAMES P. OREIGHTON, OF LOUISVILLE, KENTUCKY. ASSIGNOR OF ONE HALF TOVILLIAM DEERING, OF SAME PLACE.

FRICTION GEARING OR PULLEY.

SPECIFICATION forming part of Letters :Patent No. 286,533, dated October9, 1888.

Application filed March 17, 1893.

To @ZZ whom, t may concer/t:

Be it known that I, JAMES P. CnEiGHToN, a citizen of the United Stat-es,residing at Louisville, in the county of Jefferson andState of Kentucky,have invented certain new and useful Improvements in Friction Gearing orPulleys 5 and I do declare the following to be a full, clear, 'and exactdescription of the in vention, such as will enable others skilled in theart to which it appertains to make and use the same,refcrence being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form a part of this specification.

Figure l of the drawings is a plan view. Fig. 2 is a vertical sectionthrough one of the pulleys, and Fig. 3 is a cross-sectional view of thesame.

lIhis invention has relation to friction pulleys or gearing; and itconsists in providing, in connection with parallel shafts, conicalfriction pulleys having their larger ends turned in opposite directions,and adjusting devices whereby one or both of said frictionpulleys may bemoved longitudinally to effect renewed impact, all as hereinafter setforth.

In the accompanying drawings, the letters S and S indicate parallelshafts, and P and P are conical pulleys,arranged, respectively, on saidshafts and in frictional contact with each other.

Heretofore it has been customary, when friction-pulleys have become wornaway or their shafts unduly pressed asunde'r, to adjust for propercontact by providing new pulleys, or by movi-ng the shafts and their journal-boxes.

The object of this invention is to provide (No modi-l.)

v for renewed impact ofthe pulleys by shifting ilocated, engaging athread, fv, on the shaft.

When the pulley needs adjustment to rectify its frictional contact, oneof these nuts is loosened, and the other is forcibly turned up againstthe end of the pulley, and moves the latter until proper contact isattained. Then the iirst nut is turned back against the pulley, so thatit is firmly held in the new position; 0r the pulley may be adjusted byhand and held in position after adj ustlnent by means of ring-clamps orother common fastenings.

VhatI claim, and desire to secure by Letters Patent, is-

Longitudinal]y-adjustablc conical frictionpulleys on parallel shafts,having their larger ends turned in opposite directions, and adjustablefastening devices, whereby one or both of lsaid frictionpulleys may beadjusted longitudinally and secured in position after adjustnient,substantially as specified. Y

In testimony whereof I affix my signature in presence of two witnesses.

JAMES P. CREIGIITON.

Vitnesses:

P. D. LOGAN, ARTHUR I. Miras.

